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LangGraph · Class

Overwrite

Overwrite replaces a LangGraph channel value without running its reducer. Use it when a normal update would merge data instead of replacing or clearing it.

Last updated

Since
v1.2

Syntax

Overwrite(self, value: Any, type: Literal['__overwrite__'] = '__overwrite__')

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  • BinaryOperatorAggregate
  • InvalidUpdateError
  • reducer
  • StateGraph
  • UntrackedValue

Source: Overwrite | langgraph | LangChain Reference. Checked 2026-11-03.